Feeding device for glass-grinding machines.



M. P. A. LARONDE. FEEDING DEVICE FOR GLASS GRINDING MACHINES. APPLICATION FILED mums. 1910.

998 353 Patented July 18, 1911.

' with I UNITED STATES PATENT; OFFICE.

MICHEL PAUL AUGUSTELIJARIONDE,

orl'nnicrin, FRANCE, AssiGNoR TO s'oc'IETE' ANONYMEQDES VERBERIES ET MAN UFACTURES DES GLACES DANICHE, 0F ANICHE, I

FRANCE, A CO RPOBATJ ION OE FRANCE.

FEEDI G DEVICE FOR GLASS-GRINDING -MACHI1\TES.

To all whom it may concern: r

Be it known that I, MICHEL PAUL AU'GUSTE LARONDE, a citizen of the-French Republic,

residing at Aniche, Department of Nord,

France, have invented certain new and use- 'ful Improvements in Feeding Devices for Glass-Grinding Machines, of which the following is a full, clear, and exact description I This invention relates to feeding devices for glass-grinding machines in which sand is employed for the grinding of the. glasses. The sand so employed notbeing utilized in its entirety, a portibn thereof escapes from the'apparatus without having performed its function, and the current of water which in circulating around the platform receives the projected matter removes what is a mixture -of both fresh and used sand. In'orde'r to recover this unused sand, according to the method at present employed, the current of residual water leaving the apparatus is directed into a series of tanks in which the large particles aredeposited, the remainder being transferred to classifyin apparatus a view to its utilization or soaping.

way is removed The sand collected in this from the tanks and returned again to the grinding apparatus; this operation necessitates laborious and onerous work.-

The. present invention has for object a means which, in combination with an elevating device for the sand suspended in'thewater, allows within any manual labor or maintenance expenses and with a minimum of power expended: (l) of extracting from the residual water the unused sand capable of being employed again; (2) of delivering above the grinding apparatusa current of water containing in suitable dilution the sand thus taken .up added to the necessary complement of quite fresh sand freed from all earthy matter and all foreign bodies.

' The residual water is directed to the bottom of awell of suitable section in which it rises with acertain speed; under the influence of this speed and of their mass, the particles,"

remain suspended in the ascending current at a depth varying with their weight. The ground particles of small size and light weight, are carriedvto the top of the well whence they may be removed by means ofan overflow. The unused particles, on the nexed drawing, in which':-

Specification ofLetters Patent. Patented July 18, 19111. Application filed January 29, 1910. Serial No. 540,846. 7

other hand, being larger and therefore.

heavier, remain in suspensionat the bottom of the well where theymay be collected by amount of the feed may be. added to the residual water so that it is retained in the same way as the unused sand at the bottom complete the or air-lift, a pump or of the well and extracted at the same time.

One form of apparatus serving for earlying out the invention is described hereafter by way of example with reference to v the an- Figure l is a vertical section paratus. Fig. 2 is a plan. The-apparatusconsists ofa rectangular of the ap-' well-A divided vertically into two unequal parts a ay a wallB descendingvt'o the bottom of the well and furnished with an opening Z) which connects/the two compartments at the bottom, adjustable in area by means of a register or shutter b. v

Thesmall compartment or cell a receives at its upper-end the sandy water from a ci'r- 'cular channel C surrounding the grinding apparatus, and the fresh sand intended to.

complete the amount of the feed and conveyed from a containing bin or silo 'D through a passaged.

The sand stored by suitable means in the,

this opening being 3 silo D is dredged out'by a water-jet d reg11- lated by a cock r and falls into the passage d through an orifice (i v formed in a false-bot? tom 6%; theLwater-jet cl is directed so- 382 always to, cle-arjthe 'orifice d which may readily be closed'by a conical wooden plug 61 guided in two collars d and passing from top to bottom of the bin.

The bin D is provided with an overflow d r which delivers to the. discharge passage d. I a if The united streams of sandy water coming from'the apparatus andafromthe silo D fall into a metalloasket E which is immersed in the Water in the cell up; this basket 'is in-.-.

tended to retain pebbles, or stones and other foreign bodies which may be formed in the sand, and it rests upon'the brink of the well by means of handles 6 which allow of lifting it-with ease when it requires emptying. The water thus strained descends to the hot- 30 the. speed tom of the-well Aand passes to' the'jcella through the opening I) which is' ad ju'sted G area to insure a su cient speed of the current to scour the bottom of the-well and pref:

- no trace of unused sand. The water rises slowly in thecell a and leaves by an overflow F- which removes it to waste.

The emulsifiersor'air-liftsG G descend into, the cell a, their suction on ijnlet being at a suitable distance from the bottom. These emulsifiers are operated by two plpes .g 9 connected to a compressed-air supply f;

- athreeway cock? is arranged in such a way that air is a ays admitted to v one 0t theinlet pipes g 9", that is neither of the emulsifiers can be put out of action without the other being started; .in this wayth'e regular removal of sand which is retained 'by its weight in the sump is insured "and obstruction. of the apparatus is prevented. A- cock 1" placed upon the air pipe 7 allows of isolating the apparatus and of regulating of the emulsifiers during operation. Lastly, each emulsifier is provided with a pipe h it having a stop-cock h h leading to 'itsbase-a jet of water; this an r'angement allows of preventing any deposit of sand in neighborhood of the emulsifier-inlet an 01 freeing rapidly the bottom of the well in the event of sudden stoppage of 'thecom-pressor.

The emulsifiers G G consist of plain verj40 tical tubes at the bottom of which the up turned ends of the air pipes g g deliver; their height above the water level is such that'their entirely open upper end 9 allows the expanded air to escape without evacuating the smallest quantity of raised water; the latter leaves without projection by the lateral pipe 9* g at the same time as the sand which it holds in.suspens-ion.

The emulsifier Gdelivers directly to the distributing device which feeds the grind- 'ing apparatus, while G delivers -to D at the end opposite to the overflo The working of the apparatus is'as follows :A current of .Water circulates as regularlyas possiblein thechannel C of the grinding machine and collects the sand [thrown ofl by theoperating table; this water "falls; continuallyiinto the metal basket to feed the machine,.

When it is necessary the emulsifier G is started, the lower orifice d? of the-silo is opened and the water-jet d ,'is regulated to carry away the amount of sand necessary to'complete the feed When the feed is to cease, the jet d is stopped,

.6 the oritice d of the silo is plugged,,and by the "silo closing-the air passageto the first emulsifier the second one.Gmis-st-arted. so, as to deliver into the silo D {the we ter'escapes from the si'lojthrough the overflow 03- giving up .by d b 'ntation the large particles of sand which it. contains. In this way the maintenance of the state of equilibrium in the sump A is insured, its obstruction iscompletely prevented as well as the running to waste of utilizable sand which the grinding appfb ratus may discharge outside the times of feeding, and this sandis collected automati- 'cally in the silo D, whence it may be drawn for the next operation. p The invention is not limited to the details of construction described; these may be modified without aiiecting the essence of the invention.

The apparatus may likewise be constructed with a view to any other employment and ,85. in particular to the classification and the utilization of the sand for the soaping process; in this case it would be necessary to employ several wells of a Wall of variable area, in combination with emulsfiers with intakes 9 at suitable positions to draw off the differentlgrades of sand classified in the well or we] s.

Having thus described my invention, what I claim as such and desire to secure by Letters Patent is a Y 1. In combination with a polishing machine, a well having an upward flow there- .through and means for leading thereto the residual waters with their contained sand from the polishing machine, a conduit opening into the lower portion of said well and means for leadingofl' through said conduit to the polishing machine portion of the flow of water in the well, together with the sand suspended therein at the level of the conduit inlet, substantiallyas described.

2. An apparatus of the character described comprising a well divided by a vertical partition with bottom port through which the 1,

compartments of said well communicate,

means for regulating'the 'size of said port,

a screen arranged in one of said compartments means for leading'to said screen the residual water with its contained sand from,

a polishing machine, in combination with an emulsifier arranged at the bottom of the other compartment and serving to convey from the latter the sand suspended therein at the level of the intake of said emulsifier, substantially as described.

3. An'apparatus of the character described, comprising a well with" an upward flow 'therethrough -to an overflow'outlet, means or leading thereto the residual water'with' its contained sand from a polishing machine,

'an upright conduit of predetermined capacity in saidwell and means for forcing up through said conduit thesand suspended in the water of said well atthe level of the intake of said conduit and means for returning to'the polishing machine the sand thus recovered. 1

Y 41-. An apparatus of the character described,

111g machlne with a discharge-collecting water-channel around the same, a strainer to which said channel delivers its water,'a

strange bin for unused material with a dis-' charge orifice 1n the bottom thereof, meansstrainer delivering its Water to one of said comprisin an operating table for a polish-' wells, an overflow for water and waste mat ter at the top of said second cell, air-lifts adapted to collect partic'lesof unused mate rial at the'bottom of said second cell, one of said air-lifts returning said unused material to the operating table of said polishing machine. and the other airlift delivering said unused materialflto said storage bin, and means for controlling the operation of said air-lifts. h

jIn testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

. MICHEL PAUL AUGUSTE LARONDE. Witnesses CHARLES LEJEUNE,

Liion DECAVEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, I). 0.? 

